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#include <bits/stdc++.h>
using namespace std;
unsigned int a[100005],sub[100005],poz[100005],v[100005];
int n;
int main()
{
int i,j,s=0,p;
ifstream fin("scmax.in");
fin>>n;
for(i=1;i<=n;i++)
{
fin>>a[i];
}
fin.close();
sub[1]=1;
poz[1]=0;
for(i=2;i<=n;i++)
{
for(j=i-1;j>0;j--)
{
if(a[i]>a[j] && sub[j]>=sub[i])
{
sub[i]=sub[j]+1;
poz[i]=j;
}
}
if(sub[i]==0)
{
sub[i]=1;
poz[i]=0;
}
}
ofstream fout("scmax.out");
for(i=1;i<=n;i++)
{
if(s<sub[i])
{
s=sub[i];
p=i;
}
}
i=0;
v[++i]=p;
while(poz[p]!=0)
{
v[++i]=poz[p];
p=poz[p];
}
fout<<i<<"\n";
while(i>0)
{
fout<<a[v[i]]<<" ";
i--;
}
fout.close();
return 0;
}